Ever since I was knee high to a grasshopper I've absolutely loved root beer floats. Eating is emotional to me, when I think of root beer floats, I think of being at my grandparent's house on a hot summer day when my grandma would make everyone an ice cold refreshing float. I still crave them today, but instead of having a full one I have a root beer shot. It's less than half the calories, with all the familiar taste.
All you need is a shot glass, some diet root beer and a tablespoon or so of vanilla ice cream. You can also use frozen yogurt, but the consistency will be a bit different.